[seqfan] Re: A096018

[Richard J. Mathar]

In response to http://list.seqfan.eu/pipermail/seqfan/2018-June/018692.html:

The correct equation somewhere hidden in A. Hakami (2009), Small zeros of
quadratic congruences to a prime power modulus, Phd Thesis Kansas State,
https://www.researchgate.net/publication/29868875_Small_zeros_of_quadratic_congruences_to_a_prime_power_modulus
who studies quadratic forms (for example with the diagonal matrix +1,+1,+1,-1).

See also
http://journals.math.tku.edu.tw/index.php/TKJM/article/view/1745
https://link.springer.com/article/10.1007%2Fs11139-014-9614-3
https://www.researchgate.net/profile/Ali_Hakami4